Combustibles sensor
US4663017A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1985 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | Jul 11, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/407
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A modified zirconia oxygen sensor is disclosed wherein gas flows through inner (14) and outer tubes (12) and wherein one electrode (18) is attached to the inner surface of the inner tube (14), and the second electrode (16) is attached to the outer surface of the inner tube (14). The outer catalytic surface of inner tube (14) is made inert so that an oxygen potential difference is produced between the electrodes (16, 18) which results in a voltage output, as read by the oxygen analyzer (42), which is proportional to the initial level of the combustible in the gas. The utilization of inner (14) and outer tubes (12) wherein the portion of the gas sample contacting the active electrode (18) is maintained separate from the portion of the gas sample contacting the inactive electrode (16) prevents back or edge diffusion between the electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.